Mathematical modeling of the rotor dynamics of a turbomachine on gas foil bearings subjected to vibration
- 作者: Nikolaev V.S.1,2, Tishchenko I.V.1,2
-
隶属关系:
- Bauman Moscow State Technical University
- PJSC NPO Nauka
- 期: 卷 111, 编号 3 (2022)
- 页面: 165-179
- 栏目: Original Study Articles
- URL: https://journal-vniispk.ru/0023-124X/article/view/132739
- DOI: https://doi.org/10.17816/RF111753
- ID: 132739
如何引用文章
详细
BACKGROUND: The use of gas foil bearings is a promising development in the field of turbomachinery due to their economy, autonomous operation capability, and durability. However, gas foil bearings have lower load capacities than other types of bearings. However, turbomachines are complicated, dynamic systems that must meet high standards of safety, sustainability, and durability against external mechanical factors like vibration, shock, etc.
AIM: Development of a mathematical model of rotor dynamics to predict the displacement of the rotor in foil bearings for maintaining separation between the rotor and the housing while being subjected to vibration.
METHODS: A mathematical model of the dynamics of a stiff rotor on gas foil bearings was built and analyzed, taking into account the flexibility of the bearing bushing supports and the housing of the turbomachine. Stationary and transient modes of operation, including the transient modes combined with random vibration, are simulated. The system of ordinary derivatives equations describing the mathematical model was solved by the Rado IIA method. Random vibration was modeled using digital Fourier transformation. The modeling results were analyzed by discrete Fourier transformation and short-time Fourier transformation.
RESULTS AND CONCLUSIONS: Rotor movement trajectories were obtained and the results were compared with author’s previous experimental data. Upper bound of maximal displacements was obtained. The maximum values of rotor displacement can be used to set the optimal values of blade tip gaps.
作者简介
Vitaly Nikolaev
Bauman Moscow State Technical University; PJSC NPO Nauka
编辑信件的主要联系方式.
Email: vs.nikolaev.bmstu@gmail.com
ORCID iD: 0000-0002-5360-9368
SPIN 代码: 5847-3632
Postgraduate Student
俄罗斯联邦, Moscow; MoscowIgor Tishchenko
Bauman Moscow State Technical University; PJSC NPO Nauka
Email: iv.tischenko@bmstu.ru
ORCID iD: 0000-0001-6094-8723
SPIN 代码: 5630-4301
Cand. Sci. (Tech.), Associate Professor
俄罗斯联邦, Moscow; Moscow参考
- Sukhomlinov IYa, Golovin MV Hermetic centrifugal refrigeration compressor on the gas-dynamic bearings. Compressor technology and pneumatics. 2014;6:6–10. (in Russ).
- Polikarpov AV, Vikulov AP, Zotov SN, et al. Oilfree centrifugal electric compressor with foil gasdynamic bearings. Refrigeration Technology. 2020;109(2):36–44. doi: 10.17816/RF104085 (in Russ).
- Shchedukhin SI, Polikarpov AV, Vikulov AP, et al. Bezmaslyanyy turbodetander prirodnogo gaza na lepestkovykh gazodinamicheskikh podshipnikakh. Refrigeration Technology. 2017;106(6):46–51. doi: 10.17816/RF99254 (in Russ).
- Zvonarev PN. Razrabotka metoda rascheta radial’nyh uprugogazdinamicheskih podshipnikov s predvaritel’no naprjazhennymi lepestkami dlja malyh turbomashin nizkotemperaturnyh ustanovok [dissertation] Moscow; 2005. (in Russ).
- Sytin AV. Reshenie kompleksnoj zadachi rascheta harakteristik radial’nyh lepestkovyh gazodinamicheskih podshipnikov [dissertation]. Orel; 2008. (in Russ).
- Bonello P, Pham H. The efficient computation of the nonlinear dynamic response of a foil air bearing rotor system. J. Sound Vibr. 2014;333:3459–3478. doi: 10.1016/j.jsv.2014.03.001
- Andrés LS, Rubio D, Kim TH. Rotordynamic performance of a rotor supported on bump type foil gas bearings: experiments and predictions. ASME J. Eng. Gas Turbines Power. 2007;129(3):850–857. doi: 10.1115/1.2718233
- Powell JW, Tempest MC A Study of High Speed Machines with rubber Stabilized Air Bearings. ASME J. Lubric. tech. 1968;90(4):701–707. doi: 10.1115/1.3601702
- Waumans T, Peirs J, Al-Bender F, et al. Aerodynamic journal bearing with a flexible, damped support operating at 7.2 million DN. J. Micromech. Microeng. 2011;21:104014. doi: 10.1088/0960-1317/21/10/104014
- Gu Y, Ma Y, Ren G. Stability and vibration characteristics of a rotor-gas foil bearings system with high-static-low-dynamic-stiffness supports. J. Sound Vibr. 2017;397:152–170. doi: 10.1016/j.jsv.2017.02.047
- Peshti YV. Gas lubricant. Moscow: Bauman Moscow State Technical University; 1993. (in Russ).
- Kim D. Parametric studies on static and dynamic performance of air foil bearings with different top foil geometries and bump stiffness distributions. J. Trib. 2007;129(2):354–364 doi: 10.1115/1.2540065
- Wanner G, Hairer E. Solving ordinary differential equations II. Stiff and differential algebraic problems. Moscow: Mir; 1999.
- Tishchenko IV, Nikolaev VS, Merkulov VI. Experimental Study of a Dynamics Rotor of an Aircraft Air Cycle Machine with Foil Gas Bearings. In: Refrigeration and cryogenic equipment, air conditioning and life support systems: Third international scientific and practical conference. November 19–20, 2019; Moscow, Russia. Bauman Moscow State Technical University.
- Nikolaev VS, Abalakin SA, Tishchenko IV. Comparison of efficiency losses due to leaks for turbine units of aviation air conditioning systems with petal-type gas-dynamic bearings and ball bearings. Refrigeration Technology. 2022;111(1):13–20. doi: 10.17816/RF96964
补充文件
